Goleopterological Notices, V. 495 



semi-circular in plan and forming the posterior limit of the long 

 rostriform and ante-ocular part of the head, and also of its longi- 

 tudinal groove; the foveae are situated on the oblique side-walls of 

 the declivity, and their large cavities extending under the surface 

 horizontally, thin out the chitinous envelope above them, giving 

 rise to the two large pale spots between the eyes. The second 

 refers to the peculiar masses of vestiture of the under surface, espe- 

 cially of the head and sterna; these masses are difficult to analyze 

 structurally, but appear to be formed of agglutinated scales of a 

 remarkably broad and thick form and gelatino-membranous tex- 

 ture ; this kind of vestiture has been alluded to as "sugary" by 

 Dr. Sharp, an appropriate term as far as appearance is concerned. 

 It is unnecessary at present to allude to the almost unique form of 

 the body which isolates Pselaphus from all of our other genera. 



The North American representatives do not appear to be nume- 

 rous and the four in my cabinet may be readily separated as fol- 

 lows: — 



Upper surface of the head bordering the frontal groove roughly punctate ; 

 club of the fourth palpal joint small, constituting one-third of the total 



length erichsoni 



Upper surface smooth, polished and irapunctate throughout ; clab much 

 longer. 

 Palpal club gradually formed, smooth, bearing fine erect setse only. 



Tlie club slender, occupying one-half of the total length. ..longiclavus 

 The club very long, constituting fully two-thirds of the total length, the 



peduncle more abruptly bent flistifer 



Palpal club with semi-erect curved asperities in addition to the erect setse, 

 somewhat abruptly formed and constituting about one-half the entire 

 length Ibellax 



p. fustifer n. sp. — Moderately slender and convex, polished, subimpunc- 

 tate and dark rufo-testaceous throughout, subglabrous. Head about as long 

 and wide as the prothorax, the surface feebly reticulate anteriorly, feebly, 

 sparsely punctate and setose behind, the frontal groove broad and deep, ex- 

 tending to the foveas ; occipital groove extending thence midway to the base ; 

 antennae fully two-thirds as long as the body, the basal joint scabrous, cylin- 

 drical, as long as the next three, the latter decreasing feebly in size, seventh 

 longer than the sixth or eighth, ninth thicker, longer than wide, narrower 

 and rather longer than the tenth, eleventh large, obliquely oval, pointed, as 

 long as the preceding three joints. Prothorax a little longer than wide, oval, 

 truncate at base and apex, the latter nearly equal ; sides strongly but broadly 

 arcuate; surface impunctate and strongly convex. Elytra about as long as 

 wide, nearly two-thirds longer and two and one-half times as wide as the pro- 

 thorax, the sides broadly, feebly arcuate ; humeri obsolete ; base one-third as 



